1.material:carbon steel,Cr-V and Cr-Mo 2 ... bits sockets set02-583-01 11pcs bit sockets set(1/4")◊11pcs-1/4"Dr.bit sockets:PH1,2,3,PZ1, ... -metal shelf02-583-02 9pcs bit sockets set(1/4")◊9pcs-1/4"Dr.bit sockets:T10,15,20,27, ... metal shelf02-583-03 5pcs bit sockets set(3/8")◊5pcs-3/8"Dr.bit sockets:T25,30,40,45,50mm◊ ... -metal shelf02-583-04 5pcs bit sockets set(3/8")◊4pcs-1/2"Dr.bit sockets:T40,45,55,70mm◊1pc ...